85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
// RUN: %clang_cc1 -analyze -analyzer-checker=alpha.unix.Stream -analyzer-store region -verify %s
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typedef __typeof__(sizeof(int)) size_t;
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typedef struct _IO_FILE FILE;
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#define SEEK_SET 0 /* Seek from beginning of file. */
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#define SEEK_CUR 1 /* Seek from current position. */
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#define SEEK_END 2 /* Seek from end of file. */
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extern FILE *fopen(const char *path, const char *mode);
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extern FILE *tmpfile(void);
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extern int fclose(FILE *fp);
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extern size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream);
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extern int fseek (FILE *__stream, long int __off, int __whence);
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extern long int ftell (FILE *__stream);
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extern void rewind (FILE *__stream);
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void f1(void) {
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FILE *p = fopen("foo", "r");
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char buf[1024];
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fread(buf, 1, 1, p); // expected-warning {{Stream pointer might be NULL}}
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fclose(p);
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}
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void f2(void) {
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FILE *p = fopen("foo", "r");
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fseek(p, 1, SEEK_SET); // expected-warning {{Stream pointer might be NULL}}
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fclose(p);
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}
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void f3(void) {
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FILE *p = fopen("foo", "r");
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ftell(p); // expected-warning {{Stream pointer might be NULL}}
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fclose(p);
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}
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void f4(void) {
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FILE *p = fopen("foo", "r");
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rewind(p); // expected-warning {{Stream pointer might be NULL}}
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fclose(p);
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}
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void f5(void) {
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FILE *p = fopen("foo", "r");
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if (!p)
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return;
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fseek(p, 1, SEEK_SET); // no-warning
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fseek(p, 1, 3); // expected-warning {{The whence argument to fseek() should be SEEK_SET, SEEK_END, or SEEK_CUR}}
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fclose(p);
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}
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void f6(void) {
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FILE *p = fopen("foo", "r");
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fclose(p);
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fclose(p); // expected-warning {{Try to close a file Descriptor already closed. Cause undefined behaviour}}
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}
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void f7(void) {
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FILE *p = tmpfile();
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ftell(p); // expected-warning {{Stream pointer might be NULL}}
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fclose(p);
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}
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void f8(int c) {
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FILE *p = fopen("foo.c", "r");
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if(c)
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return; // expected-warning {{Opened File never closed. Potential Resource leak}}
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fclose(p);
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}
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FILE *f9(void) {
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FILE *p = fopen("foo.c", "r");
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if (p)
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return p; // no-warning
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else
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return 0;
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}
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void pr7831(FILE *fp) {
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fclose(fp); // no-warning
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}
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// PR 8081 - null pointer crash when 'whence' is not an integer constant
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void pr8081(FILE *stream, long offset, int whence) {
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fseek(stream, offset, whence);
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}
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